Dumping-grate.



No. 642,497. Patente-d lan. 30, |900. Z. M. SLATER.

DUMPING GRATE.

(Appiicatiop filed Feb. 16, 1899.) (No Model.)

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No. 642,497. Patented lan.' 30, |900. Z. M. SLATEB.

DUMPING GBATE.

(Appu'cmon mea rep. 1e, 1899.) (No Model.) 2 Sheets--Sheet 2.

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Nrrnn STATES 'l FFICQ' ZAOHEUS MARSHALL SLATER, OF OORNWALL LANDING, NEVYORK.

DUlVlPlNG-GRATE.

SPECIFICATION forming part of Letters Patent No. 642,497, dated January30, 1900.

Application iiled February 16, 1899. Serial No. 705 ,643. (No model.)

To LZZ whom, it mln/,y concern:

Be it known that I, ZAcHnUs MARSHALL SLATER, a citizen of the UnitedStates, residing at Cornwall Landing, in the county of Orange and Stateof New York, have invented anew and useful Dumping-Grate, of which thefollowing is a specification.

This invention relates to furnace-grates; and the object of theinvention is to provide a simple and efficient device of this characterso constructed as to effect a saving in the fuel burned as compared withordinary furnaces, as well as to prevent to as great an extent aspossible the mixture of ashes and burning coal when the fire is cleaned,it being understood that any extensive ad mixture of the ashes andburning coals materially affects the temperature of the fire, andthereby the amount and character of the steam generated.

My improved furnace-grate includes in its COnstruction two independentgrate-sections and a single frame for both of them, one of saidgrate-sections being mounted to tilt, and in the present case bothsections of the grate are represented as being located within the frameand one of them as fixed, while the other is mounted fortiltingmovement, thereby to dump the whole or a part of the contents ofthe furnace, and the frame constitutes a convenient device forsustaining one of the grateseciions while separating or spacing thetilting grate-section from the furnace-wall.

In the drawings accompanying and forniing part of this specification,Figures 1 and 2 are longitudinal central sect-ions of the lower part ofa furnace of ordinary construction, showing my improved grate thereinand illustrating the tilting section thereof in its normal or operativeand depressed positions, respectively, and also representing a simplemechanism for effecting the operation of the tilting grate-section; andFig. 3 is a plan view of the same. Fig. 4 is a transverse section on theline 4 4, Fig. 1.

Similar characters refer to like parts in all the figures of thedrawings.

.As hereinbefore set forth, my improvements include a furnace-grateconsisting of two independent grate-sections and a single frame for bothof them, and one of said grate-sections being mounted to tilt, and theseimprovements may be applied to any of the wellknown forms of furnaceswithout material change in the latter.

In the drawings I have represented the lower portion of a furnace, thesame being denoted by A, having the usual ash-pit 2, into which theashes are dumped, and the door 3, by which fuel is introduced into there-box.

While the grate-frame may be of any form or material, I have representedthe same as being of rectangular shape to fit snugly within thecorrespondingly-shaped chamber of the furnace, said frame beingdesignated by 5, and as a convenient means for sustaining the same thelugs or ears 6, disposed in horizontal alinement along the inside of thefurnace, are conveniently employed. The grate-frame 5 is usually made inthe form of a cast-ing and is separated into two portions by atransverse bar 7, having an inturned flange 8, upon which and theoppositely-disposed and similarflange 9 on the end piece 10 of the framethe horizontal grate-bars 12 of the'stationary grate-sec` tion B areadapted to rest, the said grate-bars heilig held in place by anysuitable fastening means. Although the bars 12 constituting thestationary grate-section are separate from the frame, it is evident thatthey can be cast integral with the frame, this being simply a matter ofchoice. v

The movable section of the grate is designated by O and constitutes,with the fixed grate-section B, a continuous surface, upon which thefire is built and maintained, said fixed section being located at thefront of the furnace-wall. The movable grate-section, which ispreferably mounted for tilting movement., is located at the rear of thefurnace, both of said sections, as will be evident from an inspection ofFig. 3 of the drawings, being located inside of the frame.

The movable section C of the grate is represented as consisting of aframe 14, which may be a casting provided with a series of fixed bars 15in line, respectively, with the bars of the rfixed grate-section. Thegratesection C is mounted to tilt, and its axis of oscillation'islocated, preferably, to the rear of its center of gravity, whereby whensaid gratesection is released the weight of the mass thereon will causethe same to promptly tilt.

Said grate-section O has in its opposite sidel bars openings 16, throughwhich a transverse IOO shaft 17 passes, the opposite ends of said shaftbeing supported by bearing-blocks 18, fixed to the inside of thefurnace.

Mechanism is provided for maintaining the tiltable grate-section C inits operative or horizontal position (represented in Fig. 1) and -whichmay be of any convenient character.

For this purpose I have represented two cams 19 and 19' secured toopposite ends of a rockshaft 20, carried by suitable bearings on thefurnace wall, the cam 19 having a downward extension 21, to which asuitable operating device, as the link 22, connected with the lever 23,is supported, the lever 23 being located outside of the furnace andmanually operable and represented as fulcrumed upon the bracket 24,secured to a convenient part of the furnace. It will be seen oninspection of Figs. 1 and 2 that the link 22 is pivoted at its oppositeends to cam extension 21 and to hand-lever 23, the connection betweenthe link and lever being at a point intermediate the fulcrum and thefree end of the latter. In Fig. 1 the grate-section C is represented asbeing in its horizontal position. To tilt the same, the free end of thelever 23 is grasped and the lever swung downward. This operation rocksthe two cams 19 and 19 about their aXes, permitting their working facesto fall away from the front end of the grate-section C, whereby saidgrate section will be depressed by the weight of the superposed massthereon, aided somewhat by the grate itself, which, it will beremembered, is supported at the rear of its center of gravity.

To restore the grate-section C to its initial position, the lever 23 iselevated until it occupies a substantially vertical position, as shownin Fig. l, the cams 19 and 19 on the operation of the lever serving toelevate the front end of the grate-section with which they roll incontact. The lever 23 and the connected parts are held in their primarypositions (represented in Fig. 1) byasubstantially U -shaped gravitatedkeeper 25, supported upon the front wall of the furnace and adapted todrop over the upper end of the lever to hold the same in its verticalposition.

In operation when it is desired to clean the fire the fireman iirstpushes the re from the front or grate section B onto the tiltablegratesection C, after which he rakes off the ashes from said frontsection, following which the fire which has been thrust back on thegrate'- section C is moved forward, together with that which wasoriginally on said grate-section C. When this is done, the grate-sectionC will be tilted in the manner before described to relieve it of theashes. In this manner the mixture of ashes and burning coal is preventedto a great extent, thereby effecting a large saving in fuel.

Various modifications in detail may be resorted to without departingfrom the spirit of the invention or sacrificing any of its advantages.

I do not limit the invention to the particular shape of the frame or thegrates therein, for their construction can be varied in this respect toadapt them to different kinds of furnaces, and for the same reason thedisposition of the cams 19 can be changed.

What I claim is- In a furnace-grate, the combination with a frameincluding sides and ends and a transverse bar, said bar and one endhaving horizontal flanges extendin g toward each other in a commonplane, a fixed grate mounted upon said flanges, the sides of the framehaving hangers depending therefrom, a shaft journaled in the hangers, asecond grate provided with depending ears, perforations in said ears ona line at the rear of the center of gravity of the grate, through whichperforations said shaft is passed whereby said grate will normally hangin a tilted position, a rock-shaft below the downwardlytilting edge ofthe grate, cams mounted upon the rock shaft adapted to engage and raisethe grate to a horizontal position, said cams having adjacent fiat sidesadapted to receive and hold the grate at different elevations, the sidesof the cams which support the grate in its uppermost and lowermostpositions lying, when in operation, above the center of gravity of thecams to hold the latter against displacement, means for rocking therock-shaft, and means for holding said shaft at different points of itsrocking movement.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two witnesses.

ZACHEUS MARSHALL SLA'IER.

Witnesses:

TowNsEND D. WOOD, ANDREW B. TAFT.

IOO

